Balancing device for sheave blocks



May 19, 1925. 1,538,051

B. S. MINOR BALANCING DEVICE FOR SHEAVE BLOCKS Filed April 14, 1924 INVENTOR.

A TTORNE Y.

Patented May 19, 1925.

11 {5T QFFICE- I BURT STANLEY ,lVlINQB, QELQS a genpns,

e roame A$IGNQB 1 s em EQR & ENGINEERING COMPANY, or ridged QAQ FQ N CCEPQTRIXZTQIOLN 10? CAL FORNIA.

.BVA-LANPING 93. weave aeoea Application filed April if Serial N9. 706,32

To all whom it may concern:

Be itknown that LBUn'r STANLEY M oR, a citizenof the United States, residing at Los 'Angeles, in the county of Los Angeles and State of California, have invented anew and useful Balancing Device Sheave Blocks, of which the following a specification. i

My invention relates to sheave blocks and particularly to a device for ba1a'noingthe block with relation to the loadf i In cable sheave block constructions haying a plurality of sheaves, oftentimes thefull number are not needed in various hoisting operations, and as a consequence if only those sheaves located'on either side of the longitudinal aXis of the block are utilized the block will be canted froin the vertical when a, load is applied thereto, thereby cre ating undue and excessive wear on the sheaveshbearings, andcable lines. By means of my device 'whi'ch may, be readily applied to'theshe a've block clevis,.,the above ti ecited difli-culty is largely obviated, the dev ice be ing disposed in such a position on the block clevis that when 'a load is suspended therefrom the pull exerted on the block will be evenly distributed to constantly maintain the same in its normal vertical position during its operation.

Other objects and advantages will be clearly apparent from the following description, reference being had to the accompanying drawing forming a part thereof, in which:

Fig. 1 is a front view of a sheave block showing cables spooled between the sheaves at one side of the vertical axis of the block with the block canted by the load.

Fig. 2 is a view similar to Fig. 1, my balancing device holding the load shifted to one side and balancing the block vertically.

Fig. 3 is a front elevation of a sheave block and my load balancing device mounted on the lower clevis of said block.

Fig. 4 is a side view of my load balancing device.

Fig. 5 is an enlarged plan view of my load balancing device.

Fig. 6 is a front view of the lower clevis of a sheave block with a modified form of my load balancing device mounted on said clevis.

7 is a sectional view taken on line Mere-6 In 'the'draw ngs I have shown a block comprising'four sheaves 10, but my in'v'e'liclevis. An upper clevis 16 is'connectedat its ends to the upper ends'of'the draw bars 11, betweenjthe outer and adjacent draw bars, b'ya bolt 17, extendingthrough the per endslof tlie draw bars and through yes 18' on the endsof'the clevis.

' My sheave block balancing device comprises a pair of arcuateclamp members 20 and which embrace the lower'cl'ev'is 13. Members 20am 21"are'formed at one end with l} terengaging hook-shaped hinge knuckles 22 and23 respectivelyiand at their ether" ends, diametrically opposite said knuckles, with a pair of external radial flanges 24 and 25 respectively, which flanges are bolted together by a pair of bolts 26, extending through the flanges, and nuts 27 screwed on the ends of the bolts against one of said flanges, whereby the device is clamped on one of the arms of the clevis with the knuckles on the inside and the flanges on the outside of the clevis. The device is formed with a saddle or concavity 28 on its inner or hinged side at the lower end thereof which rests Within the crotch 29 of the clevis and may be shifted to one side or the other of the vertical axis of the block upon loosening the nuts 27 and shift ing the device in one direction or the other on the clevis which it embraces. The load sustaining cable extending through the clevis rests in the saddle 28 and is shifted by the device to one side or the other of the clevis, whereby the load is correspondingly shifted and the block balanced, so that the block will hang perpendicularly and cause the suspending cables to travel centrally andfreely around said sheaves,

In the modified form of my invention shown in Figs. 6 and 7, the device is formed of one piece of metal bent substantially U- shaped in the form of an arcuate head 30, and a pair of spring arms 31. A saddle 32 is formed in the top of the head 30. Head 30 and arms 31 embrace the clevis in the crotch 29 thereof with the head 30 and saddle 32 on the inside of the clevis and the extremities of the arms at the outside of the clevis. A single bolt 33 extends through the ends of the arms 31 outside the clevis and a nut 34 screws on the end of said bolt against one of said arms, whereby the device is clamped on the clevis. The saddle 32 may be adjusted from one side to the other of the clevis upon loosening the nut 3a and 'shifting the device in one direction or the other on the clevis.

What I claim is:

1. In combination with a sheave block provided with a clevis for sustaining a load, a block balancing device formed with a seat for receiving the load sustaining cable, and means for adjustably mounting said device on the clevis of said block, whereby said seat may be positioned at either side of the vertical axis of said blocln 2. In combination with a sheave block provided with a clevis, of a block balancing device consisting of a pair of clamping members movably secured together, said device adapted to be detachably secured to either side of the vertical axis of the block, whereby to shift a load suspended from the block to one side or the other of its vertical axis;

3. In combination with a sheave block provided with a clevis for sustaining a load, a

block balancing device comprising a air of clamp members formed with a concavity for receiving the load sustaining cable, one end of said members being formed with interengaging hook-shaped hinge knuckles, and securing means at the other end of said members for clamping said device in different positions on the clevis of said block, A

whereby to shift a load suspended from the blocks to one side or the other of its vertical was 4. In combination with a sheave block provided with a clevis for sustaining a load, a block balancing device comprising a pair of clamp members formed with a saddle for receiving the load sustaining cable, one end of said members being formed with interengaging hook-shaped hinge knuckles, flanges on the other ends of said members, and bolts and nuts for drawing said flanges together whereby the device may be clamped in different positions on said clevis and said saddle positioned in the center or at either side of the crotch of the clevis for balancing the load on the sheave block.

5. In combination with a sheave block provided with a clevis for sustaining a load, of an adjustable member secured to said clevis for shifting the load carried by said block to either side of its vertical axis, whereby to balance the sheave block when certain of the sheaves are inactive.

In witness that I claim the foregoing I have hereunto subscribed my name this 8th day of March, 1924.

BURT STANLEY MINOR. 

